The singer-songwriter left the X Factor studios in an ambulance on Sunday night (20 October) after slipping down a set of stairs following the second results show.
Abi injured her back and was taken to hospital for tests, meaning she had to skip a scheduled appearance on spinoff show The Xtra Factor that night. She was released from hospital that evening.
But it looks like Abi is back on form as she attended the star-studded premiere of Thor: The Dark World in Leicester Square, London on Tuesday night (22 October).
The 19-year-old pulled out all the glamour stops in a glittering black dress with thigh high split, teamed with strappy heels, a chic up 'do and a statement red lip.
Abi was joined at the premiere by the rest of the X Factor finalists, including fellow girls category singers Tamera Foster and Hannah Barrett.
And it turns out Abi is a girl after our own hearts! She tweeted during the evening that Thor's leading man Chris Hemsworth had won her heart.
"[He] is an absolutely beautiful human being by the way," she wrote.
Getting all glammed up for a glitzy night out and sharing a red carpet with the gorgeous Chris Hemsworth? Us, jealous?
Check out all the X Factor finalists on the red carpet in our gallery below:
Copyright: WENN Lia Toby